I respectfully disagree; I think GIMP is a great example of an open source alternative that is both markedly worse than the corresponding commercial product, and yet good enough to inhibit the creation of new open source projects that would otherwise jeopardise the market share of that commercial product.
If I were an engineer at Adobe, and I was asked to make an open source project that would in no way endanger Photoshop - a product no serious Photoshop pro could ever figure out or be satisfied with - I'd give you something very much like GIMP. The fact that open source devs are generally content with GIMP is fantastic (for Adobe): it reduces the risk they'll create something actually competitive among artists and designers. Plus, Adobe gets to point to the GIMP if they're ever accused of monopolistic or anti-competitive behaviour.
If I were an engineer at Adobe, and I was asked to make an open source project that would in no way endanger Photoshop - a product no serious Photoshop pro could ever figure out or be satisfied with - I'd give you something very much like GIMP. The fact that open source devs are generally content with GIMP is fantastic (for Adobe): it reduces the risk they'll create something actually competitive among artists and designers. Plus, Adobe gets to point to the GIMP if they're ever accused of monopolistic or anti-competitive behaviour.